the taliban is claiming responsibility. it comes less than a week after the assassination of karzai's half-brother. >>> some terrifying moments in canada, when a sudden and violent storm caused the main stage in ottawa blues festival to collapse. the performing band, cheap trick, managed to escape unharmed, but at least five stage volunteers were hurt, one seriously. >>> and, first it was mila kunis, then justin timberlake. now 90-year-old actress betty white has been invited to the marine corps ball. in a youtube video, sergeant ray lewis called the legendary golden girl funny, sweet and mature, the all-around perfect woman. >>> and now here's an early look at how wall street will kick off the day. the dow opens at 12,479, after gaining 42 points on friday. the s&p rose 7 points. the nasdaq climbed 27. taking a look at overseas trading this morning, in tokyo, the nikkei added 38 points. but in hong kong, the hang seng dropped 70. >>> this week, along with the future of america's economy, traders on wall street will largely